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Related Concept Videos

Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
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Space-Time Curvature and the General Theory of Relativity

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Gravitation Between Spherically Symmetric Masses01:14

Gravitation Between Spherically Symmetric Masses

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Newton's Law of Gravitation

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Newton's Law of Gravitational Attraction01:24

Newton's Law of Gravitational Attraction

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Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Model for gravity at large distances.

Daniel Grumiller1

  • 1Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/136, A-1040 Vienna, Austria.

Physical Review Letters
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

We developed a gravity model for central objects at large distances. This model reveals an unexpected Rindler acceleration, causing anomalous test particle motion, which deviates from general relativity predictions.

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Area of Science:

  • Theoretical Physics
  • Cosmology
  • Gravitational Physics

Background:

  • General relativity describes gravity but may require effective models at large scales.
  • Understanding gravitational effects on large scales is crucial for cosmology.

Purpose of the Study:

  • To construct an effective model for gravity of a central object at large scales.
  • To investigate deviations from general relativity in gravitational models.

Main Methods:

  • Large radius expansion of gravitational field equations.
  • Analysis of effective model terms including cosmological constant and Rindler acceleration.

Main Results:

  • The effective model includes a cosmological constant, a Rindler acceleration, and scale-setting terms.
  • A Rindler acceleration term, not predicted by standard general relativity, was identified.
  • This Rindler term induces anomalous acceleration in the geodesics of test particles.

Conclusions:

  • The constructed model offers a new perspective on gravity at large scales.
  • The Rindler acceleration suggests potential new physics or a novel interpretation of existing gravitational theories.
  • Further research is needed to explore the implications of anomalous geodesic acceleration.